Process for producing sodium salts
Patent 6576209 Issued on June 10, 2003. Estimated Expiration Date: 
December 28, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 28, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1911794 3273958 3455647 3486844 3498744 Process for the separation of insoluble materials in the production of soda ash Recovery of alkali values from salt-containing trona deposits Soda ash production Soda ash production Production of sodium carbonate from solution mine brine Patent #: 5955043 InventorsAssigneeApplicationNo. 749546 filed on 12/28/2000US Classes:423/421, Alkali metal containing (Li, Na, K, Rb, or Cs)23/302T, Sodium compounds423/206.2, Alkali carbonate from trona423/425, Sesquicarbonate423/426Densifying soda ashExaminersPrimary: Nguyen, Ngoc-YenAttorney, Agent or FirmInternational ClassesC01D 007/00C01D 007/14 Foreign Application Priority Data1998-03-04 JPAbstractA process for producing sodium salts, which comprises adding solid sodium carbonate to a first aqueous solution containing sodium carbonate and sodium hydrogencarbonate, to prepare a second aqueous solution, precipitating, separating and recovering from the second aqueous solution sodium sesquicarbonate crystals containing at least 50 mol % of the sodium hydrogencarbonate component contained in the second aqueous solution, and further recovering sodium carbonate from a mother liquor remaining after separating the sodium sesquicarbonate crystals from the second aqueous solution. |
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